A 2016 study using data from over 95 million Twitter users found that the average Twitter user had 707 followers. A statistics student wants to test the hypothesis that students at his school who use Twitter average more than 707 followers. Using a survey, he collects data from a random sample of 48 students who use Twitter. From his survey data, the statistics student calculates that the mean number of Twitter followers for his sample is 742 with a sample standard deviation of 325. Required:
a. State which hypothesis test would be appropriate in this situation.
b. Is this a two-sided test or a one-sided test? Explain why?